thinkphp/library/think/Middleware.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: Slince <taosikai@yeah.net>
// +----------------------------------------------------------------------

namespace think;

use InvalidArgumentException;
use LogicException;
use think\exception\HttpResponseException;

class Middleware
{
    protected $queue = [];
    protected $app;
    protected $config = [
        'default_namespace' => 'app\\http\\middleware\\',
    ];

    public function __construct(App $app, array $config = [])
    {
        $this->app    = $app;
        $this->config = array_merge($this->config, $config);
    }

    public static function __make(App $app, Config $config)
    {
        return new static($app, $config->pull('middleware'));
    }

    public function setConfig(array $config)
    {
        $this->config = array_merge($this->config, $config);
    }

    /**
     * 导入中间件
     * @access public
     * @param  array  $middlewares
     * @param  string $type  中间件类型
     */
    public function import(array $middlewares = [], $type = 'route')
    {
        foreach ($middlewares as $middleware) {
            $this->add($middleware, $type);
        }
    }

    /**
     * 注册中间件
     * @access public
     * @param  mixed  $middleware
     * @param  string $type  中间件类型
     */